TEGIWA Replica JDM Bass Tubes. These are fibreglass replicas of sought-after optional extra Honda bass tubes. They improve sound quality and bass in the rear speaker compartment in EF CRX's. These neatly mount behind the original rear speaker grills. Suitable for a 4.5" speaker. To install you will be required to drill holes for the speaker wire to go through. Sold as a pair. The 3rd image shows the original pod against our replica.